20210303221 has 4 divisors (see below), whose sum is σ = 20315020012. Its totient is φ = 20105586432.

The previous prime is 20210303219. The next prime is 20210303227. The reversal of 20210303221 is 12230301202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2219446321 + 17990856900 = 47111^2 + 134130^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210303221 - 2¹ = 20210303219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210303195 and 20210303204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210303227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52358106 + ... + 52358491.

It is an arithmetic number, because the mean of its divisors is an integer number (5078755003).

Almost surely, 2^20210303221 is an apocalyptic number.

It is an amenable number.

20210303221 is a deficient number, since it is larger than the sum of its proper divisors (104716791).

20210303221 is a wasteful number, since it uses less digits than its factorization.

20210303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104716790.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20210303221 its reverse (12230301202), we get a palindrome (32440604423).

The spelling of 20210303221 in words is "twenty billion, two hundred ten million, three hundred three thousand, two hundred twenty-one".